If the coefficient of performance of a refrigerator is $5$ and it operates at a room temperature of $27\,^{\circ}C$,find the temperature inside the refrigerator.

The freezing compartment of a refrigerator is at $0^{\circ} C$ and the room temperature is $27.3^{\circ} C$. Calculate the work done by the refrigerator to freeze $1 \ g$ of water at $0^{\circ} C$. (Given: $L_{\text{ice}} = 80 \ cal \ g^{-1}$) (in $J$)

$A$ Carnot heat engine has an efficiency of $10 \%$. If the same engine is worked backward to obtain a refrigerator,then the coefficient of performance of the refrigerator is

In a refrigerator,heat is removed from a low-temperature reservoir and deposited at a high-temperature reservoir. This requires mechanical work,which is provided by an electric motor. If the motor power is $1 \ kW$ and heat is transferred from $-3^{\circ} C$ to $27^{\circ} C$,calculate the heat removed from the refrigerator per second,assuming the efficiency is $50\%$ of the ideal Carnot refrigerator. (in $kJ/s$)

$A$ refrigerator is to maintain eatables kept inside at $9^{\circ} C$. If room temperature is $36^{\circ} C$,calculate the coefficient of performance.

The coefficient of performance of a refrigerator is defined as: